Published online by Cambridge University Press: 24 October 2008
According to the Frenkel theory of adsorption, the first molecules striking a surface move about on it like a two-dimensional gas before finally being adsorbed. This surface motion has been demonstrated by Estermann and by Cockcroft in the case of vaporised cadmium.
* Estermann: Zeits. f. Physik, vol. 33, p. 320 (1925).Google Scholar
† Cockcroft: Proc. Roy. Soc. vol. 119, p. 293 (1928).Google Scholar
‡ Ditchburn: to be published shortly.
* These were chosen because they were much thinner than other kinds which were tried.
† There would, of course, be a reduction in intensity at distances 5 × 10−3 mm. from the edge all along the slit.
* Loc. cit.
* Loc. cit.